US20220397156A1 - Bearing integrated seal - Google Patents
Bearing integrated seal Download PDFInfo
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- US20220397156A1 US20220397156A1 US17/835,641 US202217835641A US2022397156A1 US 20220397156 A1 US20220397156 A1 US 20220397156A1 US 202217835641 A US202217835641 A US 202217835641A US 2022397156 A1 US2022397156 A1 US 2022397156A1
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- Prior art keywords
- bearing
- seal
- axial direction
- bearing member
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- 230000007797 corrosion Effects 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 239000010960 cold rolled steel Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
- F16C33/7873—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section
- F16C33/7876—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section with sealing lips
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/74—Sealings of sliding-contact bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/18—Sealings between relatively-moving surfaces with stuffing-boxes for elastic or plastic packings
- F16J15/184—Tightening mechanisms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3228—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip formed by deforming a flat ring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2204/00—Metallic materials; Alloys
- F16C2204/10—Alloys based on copper
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2206/00—Materials with ceramics, cermets, hard carbon or similar non-metallic hard materials as main constituents
- F16C2206/02—Carbon based material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
- F16C2208/10—Elastomers; Rubbers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
- F16C2208/20—Thermoplastic resins
- F16C2208/30—Fluoropolymers
- F16C2208/32—Polytetrafluorethylene [PTFE]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
- F16C2208/20—Thermoplastic resins
- F16C2208/76—Polyolefins, e.g. polyproylene [PP]
- F16C2208/78—Polyethylene [PE], e.g. ultra-high molecular weight polyethylene [UHMWPE]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
- F16C2226/50—Positive connections
- F16C2226/52—Positive connections with plastic deformation, e.g. caulking or staking
Definitions
- the present disclosure relates to a bearing integrated seal used for a portion in which a bearing and a shaft seal of a vacuum pump, a compressor, an EGR valve, or the like, are proximately used.
- a sintered bearing which is formed of a sintered material and includes a bearing sleeve having a shaft hole, an annular ring-shaped seal member provided such that one surface thereof is in contact with the bearing sleeve, and a washer member provided in contact with the other surface of the seal member in an opposite side to the surface thereof to fit the seal member to the bearing sleeve, and in which the washer member is fixed to the bearing sleeve has been known.
- the seal member is integrally formed, and therefore, space saving, reduction in costs, or the like can be advantageously achieved.
- the present disclosure has been devised and it is therefore an object of the present disclosure to achieve a bearing integrated seal having excellent rigidity and corrosion resistance.
- a bearing member and a seal member are covered by an outer member and inner member.
- a bearing integrated seal includes a cylindrical bearing member, an outer member covering at least an outer periphery and one axial direction end of the bearing member, an annular ring-shaped seal member provided such that one surface thereof covers the other axial direction end of the bearing member in an inner surface side of the outer member, and an inner member covering the other surface of the seal member in an opposite side to the one surface to fit the seal member to the bearing member in the inner surface side of the outer member, and the inner member is fixed to the outer member to fix the bearing member and the seal member.
- FIG. 1 is a cross-sectional view illustrating a bearing integrated seal according to an embodiment of the present disclosure.
- FIG. 2 is a perspective view of the bearing integrated seal with a portion broken.
- FIG. 3 is a perspective view of a bearing integrated seal according to a modified example of the embodiment according to the present disclosure, corresponding to FIG. 2 .
- a bearing integrated seal includes a cylindrical bearing member, an outer member covering at least an outer periphery and one axial direction end of the bearing member, an annular ring-shaped seal member provided such that one surface thereof covers the other axial direction end of the bearing member in an inner surface side of the outer member, and an inner member covering the other surface of the seal member in an opposite side to the one surface to fit the seal member to the bearing member in the inner surface side of the outer member, and the inner member is fixed to the outer member to fix the bearing member and the seal member.
- the inner member is fixed to the outer member, and thus, the bearing member and the seal member can be fixed so as to be sandwiched between the inner member and the outer member in an axial direction. Therefore, even in a case where the bearing member is formed of a sintered member having relatively low rigidity, sufficient rigidity can be ensured. Moreover, the bearing member is sandwiched between the outer member and the seal member, and therefore, the bearing member is not exposed to sealed fluid and thus has excellent corrosion resistance. Furthermore, the seal member is integrally formed with the bearing member, and therefore, the number of parts is reduced, thereby facilitating mounting and saving a space.
- the inner member has an L shape in a cross section, an axial direction flat surface of the inner member covers the other surface of the seal member, and an outer peripheral flat surface of the inner member is in contact with an inner peripheral flat surface of the outer member.
- the inner member is face contacted with the outer member and is reliably fixed to the outer member.
- an end portion of the inner member in an opposite side to the axial direction flat surface is caulked and joined with an end portion of the outer member in an opposite side to the bearing member.
- caulking joining is provided in a state where the inner member is face contacted with the outer member, and therefore, the bearing member and the seal member are reliably fixed.
- the inner member covers the other surface of the seal member with an annular ring-shaped gasket interposed therebetween. According to the above-described structure, a leak (internal leak) flowing between the inner member and the seal member can be prevented.
- the outer member covers the one axial direction end of the bearing member with an annular ring-shaped gasket interposed therebetween.
- the seal member covers the other axial direction end of the bearing member with an annular ring-shaped gasket interposed therebetween.
- FIG. 1 and FIG. 2 illustrate a bearing integrated seal 1 of an embodiment of the present disclosure, and the bearing integrated seal 1 includes a cylindrical bearing member 2 .
- the bearing member 2 may be formed of various materials.
- the bearing member 2 may be formed of a sintered material, and may be a bush formed of a copper alloy, carbon, resin, or the like.
- the bearing integrated seal 1 includes an outer member 3 covering at least an outer periphery 2 a and one axial direction end 2 b of the bearing member 2 .
- a one axial direction flat surface 3 b of the outer member 3 is face contacted with the one axial direction end 2 b of the bearing member 2 .
- the outer member 3 has, for example, an annular ring shape formed such that a portion is bent and is a metal member formed of a stainless steel sheet, a cold-rolled steel sheet, or the like.
- a material such as a stainless steel sheet or the like, having high corrosion resistance is suitable for a portion that requires corrosion resistance but, depending on a case, some other material than a metal material may be used, as long as the material is a rigid body that can be bent.
- the bearing integrated seal 1 includes an annular ring-shaped seal member 4 provided such that one surface 4 a thereof covers the other axial direction end 2 c of the bearing member 2 in an inner surface side of the outer member 3 .
- the seal member 4 is formed of a resin material, such as nylon, polyethylene, polytetrafluoroethylene (PTFE) that is chemically stable and has excellent heat resistance and chemical resistance, or the like, a rubber material, or the like.
- PTFE polytetrafluoroethylene
- the bearing integrated seal 1 further includes an inner member 5 covering the other surface 4 b of the seal member 4 in an opposite side to the one surface 4 a and fitting the seal member 4 to the bearing member 2 in the inner surface side of the outer member 3 .
- the inner member 5 is fixed to the outer member 3 to fix the bearing member 2 and the seal member 4 .
- the inner member 5 has, for example, an annular ring shape and a L shape in a cross section formed by bending, an axial direction flat surface 5 a of the inner member 5 covers the other surface 4 b of the seal member 4 , and an outer peripheral flat surface 5 b of the inner member 5 is in contact with an inner peripheral flat surface 3 a of the outer member 3 .
- the inner member 5 is also preferably a metal member, such as a stainless steel sheet, a cold-rolled steel sheet, or the like, but, depending on a case, may be a rigid body that can be bent. For a portion that requires corrosion resistance, a material, such as a stainless steel sheet or the like, having high corrosion resistance is suitable.
- An end portion 5 c of the inner member 5 in an opposite side to the axial direction flat surface 5 a is caulked and joined with an opposite-side end portion 3 c of the outer member 3 in an opposite side to the bearing member 2 .
- the opposite-side end portion 3 c can be easily caulked and joined when the opposite-side end portion 3 c is formed to be thinner than the other portions.
- Caulking joining is provided by the opposite-side end portion 3 c in a state where the outer peripheral flat surface 5 b of the inner member 5 is face contacted with the inner peripheral flat surface 3 a of the outer member 3 , and therefore, the bearing member 2 and the seal member 4 are reliably fixed.
- the inner member 5 is reliably fixed to the outer member 3 , and thus, the bearing member 2 and the seal member 4 can be fixed so as to be sandwiched between the inner member 5 and the outer member 3 in an axial direction. Therefore, even in a case where the bearing member 2 is formed of a sintered member having relatively low rigidity, sufficient rigidity can be ensured.
- the bearing member 2 is sandwiched between the outer member 3 and the seal member 4 , and therefore, the bearing member 2 is not exposed to sealed fluid and has excellent corrosion resistance.
- the seal member 4 is integrally formed with the bearing member 2 , and therefore, the number of parts is reduced, thereby facilitating mounting and saving a space.
- the bearing integrated seal 1 having excellent rigidity and corrosion resistance can be achieved.
- FIG. 3 illustrates a bearing integrated seal 1 ′ according to a modified example of the above-described embodiment of the present disclosure and the modified example is different from the above-described embodiment in a point that a gasket 6 is provided.
- each component common in FIG. 1 and FIG. 2 is identified by the same reference character, and the detailed description thereof will be omitted.
- the inner member 5 covers the other surface 4 b of the seal member 4 with an annular ring-shaped gasket 6 interposed therebetween. That is, the gasket 6 is sandwiched between the axial direction flat surface 5 a of the inner member 5 and the other axial direction end 2 c of the bearing member 2 . With the gasket 6 provided, a leak (internal leak) flowing between the axial direction flat surface 5 a of the inner member 5 and the other surface 4 b of the seal member 4 can be prevented.
- a position of the gasket 6 is not limited to a position described in this modified example.
- the outer member 3 may be configured to cover the one axial direction end 2 b of the bearing member 2 with the annular ring-shaped gasket 6 interposed therebetween. In this case, with the gasket 6 provided, a leak (internal leak) flowing between the one axial direction flat surface 3 b of the outer member 3 and the one axial direction end 2 b of the bearing member 2 can be prevented.
- the seal member 4 may be configured to cover the other axial direction end 2 c of the bearing member 2 with the annular ring-shaped gasket 6 interposed therebetween.
- a leak internal leak flowing between the one surface 4 a of the seal member 4 and the other axial direction end 2 c of the bearing member 2 can be prevented.
- a plurality of gaskets 6 may be provided in the above-described plurality of positions.
Abstract
A bearing integrated seal includes a cylindrical bearing member, an outer member covering at least an outer periphery and one axial direction end of the bearing member, an annular ring-shaped seal member provided such that one surface thereof covers the other axial direction end of the bearing member in an inner surface side of the outer member, and an inner member covering the other surface of the seal member in an opposite side to the one surface to fit the seal member to the bearing member in the inner surface side of the outer member, and the inner member is fixed to the outer member to fix the bearing member and the seal member.
Description
- The present application is a continuation application filed under 35 U.S.C. 111(a) claiming benefit under 35 U.S.C. 120 and 365(c) of Japanese Patent Application No. 2021-096501 filed on Jun. 9, 2021, the entire contents of which are incorporated herein by reference.
- The present disclosure relates to a bearing integrated seal used for a portion in which a bearing and a shaft seal of a vacuum pump, a compressor, an EGR valve, or the like, are proximately used.
- Conventionally, for example, as in Japanese Unexamined Patent Publication No. 2018-84292, a sintered bearing which is formed of a sintered material and includes a bearing sleeve having a shaft hole, an annular ring-shaped seal member provided such that one surface thereof is in contact with the bearing sleeve, and a washer member provided in contact with the other surface of the seal member in an opposite side to the surface thereof to fit the seal member to the bearing sleeve, and in which the washer member is fixed to the bearing sleeve has been known. In this type of sintered bearing, the seal member is integrally formed, and therefore, space saving, reduction in costs, or the like can be advantageously achieved.
- However, in the sintered bearing described in Japanese Unexamined Patent Publication No. 2018-84292, in a case where a bearing portion is exposed to sealed fluid, a problem in corrosion resistance arises.
- In a case where the seal member is caulked and joined directly to the bearing member, depending on a material of the bearing member, a problem arises in which integration is difficult due to insufficiency of rigidity of the bearing member itself
- In view of the foregoing, the present disclosure has been devised and it is therefore an object of the present disclosure to achieve a bearing integrated seal having excellent rigidity and corrosion resistance.
- In order to achieve the above-described object, according to the present disclosure, a bearing member and a seal member are covered by an outer member and inner member.
- Specifically, according to the present disclosure, a bearing integrated seal includes a cylindrical bearing member, an outer member covering at least an outer periphery and one axial direction end of the bearing member, an annular ring-shaped seal member provided such that one surface thereof covers the other axial direction end of the bearing member in an inner surface side of the outer member, and an inner member covering the other surface of the seal member in an opposite side to the one surface to fit the seal member to the bearing member in the inner surface side of the outer member, and the inner member is fixed to the outer member to fix the bearing member and the seal member.
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FIG. 1 is a cross-sectional view illustrating a bearing integrated seal according to an embodiment of the present disclosure. -
FIG. 2 is a perspective view of the bearing integrated seal with a portion broken. -
FIG. 3 is a perspective view of a bearing integrated seal according to a modified example of the embodiment according to the present disclosure, corresponding toFIG. 2 . - According to a first aspect of the present disclosure, a bearing integrated seal includes a cylindrical bearing member, an outer member covering at least an outer periphery and one axial direction end of the bearing member, an annular ring-shaped seal member provided such that one surface thereof covers the other axial direction end of the bearing member in an inner surface side of the outer member, and an inner member covering the other surface of the seal member in an opposite side to the one surface to fit the seal member to the bearing member in the inner surface side of the outer member, and the inner member is fixed to the outer member to fix the bearing member and the seal member.
- According to the above-described structure, the inner member is fixed to the outer member, and thus, the bearing member and the seal member can be fixed so as to be sandwiched between the inner member and the outer member in an axial direction. Therefore, even in a case where the bearing member is formed of a sintered member having relatively low rigidity, sufficient rigidity can be ensured. Moreover, the bearing member is sandwiched between the outer member and the seal member, and therefore, the bearing member is not exposed to sealed fluid and thus has excellent corrosion resistance. Furthermore, the seal member is integrally formed with the bearing member, and therefore, the number of parts is reduced, thereby facilitating mounting and saving a space.
- According to a second aspect of the present disclosure, in the first aspect, the inner member has an L shape in a cross section, an axial direction flat surface of the inner member covers the other surface of the seal member, and an outer peripheral flat surface of the inner member is in contact with an inner peripheral flat surface of the outer member.
- According to the above-described structure, the inner member is face contacted with the outer member and is reliably fixed to the outer member.
- According to a third aspect of the present disclosure, in the second aspect, an end portion of the inner member in an opposite side to the axial direction flat surface is caulked and joined with an end portion of the outer member in an opposite side to the bearing member.
- According to the above-described structure, caulking joining is provided in a state where the inner member is face contacted with the outer member, and therefore, the bearing member and the seal member are reliably fixed.
- According to a fourth aspect of the present disclosure, in any one of the first to third aspects, the inner member covers the other surface of the seal member with an annular ring-shaped gasket interposed therebetween. According to the above-described structure, a leak (internal leak) flowing between the inner member and the seal member can be prevented.
- According to a fifth aspect of the present disclosure, in any one of the first to fourth aspects, the outer member covers the one axial direction end of the bearing member with an annular ring-shaped gasket interposed therebetween.
- According to the above-described structure, a leak (internal leak) flowing between the outer member and the bearing member can be prevented.
- According to a sixth aspect of the present disclosure, in any one of the first to fifth aspects, the seal member covers the other axial direction end of the bearing member with an annular ring-shaped gasket interposed therebetween.
- According to the above-described structure, a leak (internal leak) flowing between the seal member and the bearing member can be prevented.
- As has been described above, according to the present disclosure, a bearing integrated seal having excellent rigidity and corrosion resistance can be achieved.
- An embodiment of the present disclosure will be described below with reference to the accompanying drawings.
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FIG. 1 andFIG. 2 illustrate a bearing integratedseal 1 of an embodiment of the present disclosure, and the bearing integratedseal 1 includes acylindrical bearing member 2. Thebearing member 2 may be formed of various materials. For example, thebearing member 2 may be formed of a sintered material, and may be a bush formed of a copper alloy, carbon, resin, or the like. - The bearing integrated
seal 1 includes anouter member 3 covering at least anouter periphery 2 a and oneaxial direction end 2 b of thebearing member 2. A one axial directionflat surface 3 b of theouter member 3 is face contacted with the oneaxial direction end 2 b of thebearing member 2. It is preferable that theouter member 3 has, for example, an annular ring shape formed such that a portion is bent and is a metal member formed of a stainless steel sheet, a cold-rolled steel sheet, or the like. In theouter member 3, a material, such as a stainless steel sheet or the like, having high corrosion resistance is suitable for a portion that requires corrosion resistance but, depending on a case, some other material than a metal material may be used, as long as the material is a rigid body that can be bent. - The bearing integrated
seal 1 includes an annular ring-shaped seal member 4 provided such that onesurface 4 a thereof covers the otheraxial direction end 2 c of thebearing member 2 in an inner surface side of theouter member 3. Theseal member 4 is formed of a resin material, such as nylon, polyethylene, polytetrafluoroethylene (PTFE) that is chemically stable and has excellent heat resistance and chemical resistance, or the like, a rubber material, or the like. - The bearing integrated
seal 1 further includes aninner member 5 covering theother surface 4 b of theseal member 4 in an opposite side to the onesurface 4 a and fitting theseal member 4 to thebearing member 2 in the inner surface side of theouter member 3. Theinner member 5 is fixed to theouter member 3 to fix the bearingmember 2 and theseal member 4. - The
inner member 5 has, for example, an annular ring shape and a L shape in a cross section formed by bending, an axial directionflat surface 5 a of theinner member 5 covers theother surface 4 b of theseal member 4, and an outer peripheralflat surface 5 b of theinner member 5 is in contact with an inner peripheralflat surface 3 a of theouter member 3. Theinner member 5 is also preferably a metal member, such as a stainless steel sheet, a cold-rolled steel sheet, or the like, but, depending on a case, may be a rigid body that can be bent. For a portion that requires corrosion resistance, a material, such as a stainless steel sheet or the like, having high corrosion resistance is suitable. - An
end portion 5 c of theinner member 5 in an opposite side to the axial directionflat surface 5 a is caulked and joined with an opposite-side end portion 3 c of theouter member 3 in an opposite side to thebearing member 2. For example, the opposite-side end portion 3 c can be easily caulked and joined when the opposite-side end portion 3 c is formed to be thinner than the other portions. Caulking joining is provided by the opposite-side end portion 3 c in a state where the outer peripheralflat surface 5 b of theinner member 5 is face contacted with the inner peripheralflat surface 3 a of theouter member 3, and therefore, thebearing member 2 and theseal member 4 are reliably fixed. - As has been described above, the
inner member 5 is reliably fixed to theouter member 3, and thus, thebearing member 2 and theseal member 4 can be fixed so as to be sandwiched between theinner member 5 and theouter member 3 in an axial direction. Therefore, even in a case where the bearingmember 2 is formed of a sintered member having relatively low rigidity, sufficient rigidity can be ensured. - Moreover, the bearing
member 2 is sandwiched between theouter member 3 and theseal member 4, and therefore, thebearing member 2 is not exposed to sealed fluid and has excellent corrosion resistance. - Furthermore, the
seal member 4 is integrally formed with the bearingmember 2, and therefore, the number of parts is reduced, thereby facilitating mounting and saving a space. - Therefore, according to the bearing integrated
seal 1 according to this embodiment, the bearing integratedseal 1 having excellent rigidity and corrosion resistance can be achieved. -
FIG. 3 illustrates a bearing integratedseal 1′ according to a modified example of the above-described embodiment of the present disclosure and the modified example is different from the above-described embodiment in a point that agasket 6 is provided. In this modified example, each component common inFIG. 1 andFIG. 2 is identified by the same reference character, and the detailed description thereof will be omitted. - The
inner member 5 covers theother surface 4 b of theseal member 4 with an annular ring-shaped gasket 6 interposed therebetween. That is, thegasket 6 is sandwiched between the axial directionflat surface 5 a of theinner member 5 and the otheraxial direction end 2 c of thebearing member 2. With thegasket 6 provided, a leak (internal leak) flowing between the axial directionflat surface 5 a of theinner member 5 and theother surface 4 b of theseal member 4 can be prevented. - A position of the
gasket 6 is not limited to a position described in this modified example. Although not illustrated, for example, theouter member 3 may be configured to cover the one axial direction end 2 b of the bearingmember 2 with the annular ring-shapedgasket 6 interposed therebetween. In this case, with thegasket 6 provided, a leak (internal leak) flowing between the one axial directionflat surface 3 b of theouter member 3 and the one axial direction end 2 b of the bearingmember 2 can be prevented. - Moreover, the
seal member 4 may be configured to cover the other axial direction end 2 c of the bearingmember 2 with the annular ring-shapedgasket 6 interposed therebetween. In this case, with thegasket 6 provided, a leak (internal leak) flowing between the onesurface 4 a of theseal member 4 and the other axial direction end 2 c of the bearingmember 2 can be prevented. - A plurality of
gaskets 6 may be provided in the above-described plurality of positions. - Note that the above-described embodiment is merely a preferable example by nature and is not intended to be particularly limiting the present disclosure, application of the present disclosure, and the scope of use.
Claims (6)
1. A bearing integrated seal comprising:
a cylindrical bearing member;
an outer member covering at least an outer periphery and one axial direction end of the bearing member;
an annular ring-shaped seal member provided such that one surface thereof covers the other axial direction end of the bearing member in an inner surface side of the outer member; and
an inner member covering the other surface of the seal member in an opposite side to the one surface to fit the seal member to the bearing member in the inner surface side of the outer member, wherein
the inner member is fixed to the outer member to fix the bearing member and the seal member.
2. The bearing integrated seal of claim 1 , wherein
the inner member has an L shape in a cross section, an axial direction flat surface of the inner member covers the other surface of the seal member, and an outer peripheral flat surface of the inner member is in contact with an inner peripheral flat surface of the outer member.
3. The bearing integrated seal of claim 2 , wherein
an end portion of the inner member in an opposite side to the axial direction flat surface is caulked and joined with an end portion of the outer member in an opposite side to the bearing member.
4. The bearing integrated seal of claim 1 , wherein
the inner member covers the other surface of the seal member with an annular ring-shaped gasket interposed therebetween.
5. The bearing integrated seal of claim 1 , wherein
the outer member covers the one axial direction end of the bearing member with an annular ring-shaped gasket interposed therebetween.
6. The bearing integrated seal of claim 1 , wherein
the seal member covers the other axial direction end of the bearing member with an annular ring-shaped gasket interposed therebetween.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021096501A JP2022188459A (en) | 2021-06-09 | 2021-06-09 | Bearing integrated seal |
JP2021-096501 | 2021-06-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20220397156A1 true US20220397156A1 (en) | 2022-12-15 |
Family
ID=81940593
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/835,641 Pending US20220397156A1 (en) | 2021-06-09 | 2022-06-08 | Bearing integrated seal |
Country Status (5)
Country | Link |
---|---|
US (1) | US20220397156A1 (en) |
EP (1) | EP4102089B1 (en) |
JP (1) | JP2022188459A (en) |
KR (1) | KR20220166189A (en) |
CN (1) | CN115451018A (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5921555A (en) * | 1997-04-10 | 1999-07-13 | Freudenberg-Nok General Partnership | Uni-directional seal for use on a shaft |
US20040124591A1 (en) * | 2002-12-31 | 2004-07-01 | Sekulich Stephen A. | Hydro-flex seal and method for making hydro-flex seal |
US20190072133A1 (en) * | 2017-09-05 | 2019-03-07 | Schaeffler Technologies AG & Co. KG | Bearing assembly with an integrated seal |
US20210363945A1 (en) * | 2018-10-29 | 2021-11-25 | Nok Corporation | Sealing device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3025113A (en) * | 1960-08-04 | 1962-03-13 | Helwig Carl | Drive shaft bearing and seal |
CN102042300B (en) * | 2009-10-12 | 2014-03-26 | 富准精密工业(深圳)有限公司 | Bearing system |
JP6709722B2 (en) | 2016-11-24 | 2020-06-17 | 株式会社ダイヤメット | Sintered bearing |
JP7246867B2 (en) * | 2018-05-23 | 2023-03-28 | 株式会社ダイヤメット | sintered bearing |
DE102018123901A1 (en) * | 2018-09-27 | 2020-04-02 | Nidec Gpm Gmbh | Plain bearing with seal arrangement and water pump with the same |
-
2021
- 2021-06-09 JP JP2021096501A patent/JP2022188459A/en active Pending
-
2022
- 2022-05-27 KR KR1020220065565A patent/KR20220166189A/en unknown
- 2022-05-31 CN CN202210609133.3A patent/CN115451018A/en active Pending
- 2022-06-03 EP EP22177284.1A patent/EP4102089B1/en active Active
- 2022-06-08 US US17/835,641 patent/US20220397156A1/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5921555A (en) * | 1997-04-10 | 1999-07-13 | Freudenberg-Nok General Partnership | Uni-directional seal for use on a shaft |
US20040124591A1 (en) * | 2002-12-31 | 2004-07-01 | Sekulich Stephen A. | Hydro-flex seal and method for making hydro-flex seal |
US20190072133A1 (en) * | 2017-09-05 | 2019-03-07 | Schaeffler Technologies AG & Co. KG | Bearing assembly with an integrated seal |
US20210363945A1 (en) * | 2018-10-29 | 2021-11-25 | Nok Corporation | Sealing device |
Also Published As
Publication number | Publication date |
---|---|
KR20220166189A (en) | 2022-12-16 |
EP4102089C0 (en) | 2024-01-24 |
EP4102089A1 (en) | 2022-12-14 |
EP4102089B1 (en) | 2024-01-24 |
JP2022188459A (en) | 2022-12-21 |
CN115451018A (en) | 2022-12-09 |
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